The PROCOM SB 3 1/2 118–136 MHz-N is a ½-wave steel-band whip antenna designed for portable radio equipment in the 118–136 MHz aviation VHF band. It is built for rugged field use and provides improved performance over standard ¼-wave handheld antennas.

The antenna uses a flexible stainless steel band radiator with a curved structure that helps it maintain an upright position during portable operation. It includes a built-in matching network for proper impedance matching and is factory tuned for optimal performance across the aircraft communication band.

It is terminated with an N-type male connector, making it compatible with portable radios or test equipment using appropriate adapters.

This antenna is commonly used in aviation ground communication, handheld transceivers, and maintenance/ramp operations, where durability and stable VHF performance are required.

Key features include:

PROCOM part number: SB 3 1/2 118–136 MHz-N
Frequency range: 118–136 MHz (aircraft VHF band)
½-wave steel-band portable antenna design
Built-in impedance matching network
Rugged stainless steel flexible radiator
Vertical polarization
Gain: approx. 3–4 dB (vs ¼-wave portable antenna)
Max input power: ~25 W
Impedance: 50 Ω
Connector: N-type male
Height: approx. 830 mm
Designed for handheld/portable aviation communication use
Factory tuned for low SWR and stable field performanc